Détails:The Varsity was approaching RAF Swinderby in misty conditions. The aircraft was high on the approach as it passed the Outer Marker at 750 feet instead of 600 feet. The pilot increased the rate of descent, but could not timely arrest the descent. He advanced the power levers in an attempt to go around, but the airplane impacted the ground short of the runway.The airplane was serving with RAF 201 AFS.